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Rolls-Royce Royce Motor Cars CEO Torsten Müller-Ötvös unveils the Phantom Series II for the first time in North America at the New York International Auto Show in April. The luxury automaker enjoyed its best sales year last year in the company's 107-year history, but is Rolls-Royce what wealthy Americans drive?

Sure, six-figure supercars are the province of the uber-rich, but by and large, America's wealthy families drive fairly mainstream vehicles. That news comes from TrueCar, which rounded up the ten most popular cars in our wealthiest ZIP codes.

The company began by identifying those ZIP codes based on data from the Internal Revenue Service. At the top of the list, we find 10274 -- lower Manhattan -- with an average income of $5.7 million. That's followed by Fisher Island, Florida (33109); downtown Chicago (60604); Atherton and Century City, California (94027 and 90067); New Vernon, New Jersey (07976); Greenwich, Connecticut (06831); Palm Beach, Florida (33480); Medina, Washington (98039); and finally, Ross, California (94957), boasting an average income of $497,000 .

TrueCar then used that data to pull the most popular vehicles sold to residents of each ZIP code. The findings were occasionally surprising:

Jeep was the only Detroit brand to make any of the top-five lists: the Wrangler was hugely popular in Greenwich, and the Grand Cherokee was a winner there, too, as well as Chigago.

Less surprising was the fact that the ToyotaPrius took the #1 or #2 spot in all three California ZIP codes.

When all was said and done, TrueCar compiled all that data to come up with a list of the most popular cars in America's ten wealthiest ZIP codes. Interestingly, eight of the ten are priced below $40,000. The models that didn't make the list are almost as interesting as those that did: